William De Clark House, is located in Closter, Bergen County, New Jersey, United States. The house was built in 1776 and was added to the National Register of Historic Places on January 9, 1983. See also National Register of Historic Places listings in Bergen County, New Jersey References Closter, New Jersey Houses on the National Register of Historic Places in New Jersey Houses completed in 1810 Houses in Bergen County, New Jersey Stone houses in New Jersey National Register of Historic Places in Bergen County, New Jersey New Jersey Register of Historic Places